Magnetic Properties Of Matter Question 1
Question 1 - 2024 (30 Jan Shift 1)
The horizontal component of earth’s magnetic field at a place is $3.5 \times 10^{-5} T$. A very long straight conductor carrying current of $\sqrt{2} A$ in the direction from South east to North West is placed. The force per unit length experienced by the conductor is……. $\times 10^{-6} N / m$.
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Answer: (35)
Solution:
$B _H=3.5 \times 10^{-5} T$
$F=i \ell B \sin \theta, \quad i=\sqrt{2} A$
$\frac{F}{\ell}=i B \sin \theta=\sqrt{2} \times 3.5 \times 10^{-5} \times \frac{1}{\sqrt{2}}$
$=35 \times 10^{-6} N / m$
